A06 ENAMEL STAFF GAGE Specification.pdf

HIF-E-02K

04-29-13

U.S. GEOLOGICAL SURVEY

WATER RESOURCES DIVISION

HYDROLOGIC INSTRUMENTATION FACILITY

SPECIFICATION

FOR

ENAMEL STAFF GAGE SECTION

1. SCOPE

1.1 This specification contains the requirements for enamel gage sections used by the Water Resources Division to measure river stage in a field environment.

2. APPLICABLE DOCUMENTS

2.1 Specifications

2.1.1 The following specifications, of the issue in effect on the date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein:

HIF Specification

HIF-W-01: Workmanship

ASTM Specification

The most recent edition of A424 - Standard Specification for Steel Sheet for Porcelain Enameling.

2.1.2 ASTM specifications referenced in this specification may be obtained from:

American Society for Testing and Materials

1916 Race Street Philadelphia, PA 19103

3. REQUIREMENTS

NOTE: All dimensions in brackets, [ ], are in millimeters.

3.1 Material

3.1.1 Standard Sections - Each section shall have three coats of vitreous enamel, face and back. The three coats shall consist of one ground coat and two white cover coats. The figures and graduations of drawing numbers 0113001, 0114001, and 0114002 shall be of black vitreous enamel and shall be contained on the face of each section. The figures of drawing number 0113002 shall be of red vitreous enamel and shall be contained on the face of each plate.

3.1.2 Negative Sections – Each section shall have three coats of vitreous enamel, face and back. The three coats shall consist of one ground coat and two black cover coats. The figures and graduations of drawing number 0713001 shall be of white vitrous enamel and shall be contained on the face of each plate.

3.2 Graduations

3.2.1 Details of the graduations and numbering shall be clear and legible;

the size, weight, and style of the figures shall be as on the artwork supplied as Government Furnished Property. Tolerances are specified in the title block on drawing numbers 0113001, 0113002, 0114001, 0114002, and 0713001. Additionally, a tolerance of plus/minus .015 of an inch is specified between any two graduations within .10 of a foot and plus/ minus .035 of an inch between any other graduations within the full range of the staff plate.

3.3 Workmanship

3.3.1 Workmanship shall be in accordance with HIF Specification

HIF-W-01.

4. QUALITY ASSURANCE

4.1 Visual Inspection

4.1.1 Enamel gage sections ordered under this specification shall be visually checked for conformance to the requirements on drawing numbers 0113001, 0113002, 0114001, 0114002, and 0713001.

Failure to ten (10) percent of the test sample to pass visual inspection will constitute failure of this test.

4.2 Graduations

4.2.1 The accuracy of the graduations on the enamel gage sections made from drawing numbers 0114001, 0114002, and 0713001 shall be confirmed by checking them against an NBS traceable steel tape graduated in feet, tenths, and hundredths of a foot. The accuracy of the graduations on the enamel gage sections made from drawing number 0113001 shall be confirmed by checking them against an NBS traceable steel tape graduated in millimeters.

This check will be conducted at a temperature of 20 degrees - 30 degrees Celsius. Failure of five (5) percent of the test sample to pass accuracy requirements specified in 3.2.1 will constitute failure of this test.

4.3 Dimensions

4.3.1 The accuracy of the dimensions specified on drawing numbers

0113001, 0113002, 0114001, 0114002, and 0713001 shall be confirmed by checking them against an NBS traceable tape graduated in feet, tenths, and hundredths of a foot. This check will be conducted at a temperature of 20 degrees - 30 degrees Celsius.

Failure of five (5) percent of the test sample to meet the accuracy requirement will constitute failure of this test.

5. NOTES

5.1 Procurement documents should specify the following:

A. Title, number, and date of this specification.

B. Range of stage of enamel gage sections to be ordered.

C. Meter plates ordered.